/**
 * Copyright (C) 2015 MongoDB Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, the copyright holders give permission to link the
 * code of portions of this program with the OpenSSL library under certain
 * conditions as described in each individual source file and distribute
 * linked combinations including the program with the OpenSSL library. You
 * must comply with the GNU Affero General Public License in all respects
 * for all of the code used other than as permitted herein. If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so. If you do not
 * wish to do so, delete this exception statement from your version. If you
 * delete this exception statement from all source files in the program,
 * then also delete it in the license file.
 */

#pragma once

#include <jsapi.h>
#include <unordered_map>

#include "mongo/scripting/deadline_monitor.h"
#include "mongo/scripting/engine.h"
#include "mongo/stdx/mutex.h"
#include "mongo/util/concurrency/mutex.h"

namespace mongo {
namespace mozjs {

class MozJSImplScope;

/**
 * Implements the global ScriptEngine interface for MozJS.  The associated TU
 * pulls this in for the polymorphic globalScriptEngine.
 */
class MozJSScriptEngine final : public mongo::ScriptEngine {
public:
    MozJSScriptEngine();
    ~MozJSScriptEngine() override;

    mongo::Scope* createScope() override;
    mongo::Scope* createScopeForCurrentThread() override;

    void runTest() override {}

    bool utf8Ok() const override {
        return true;
    }

    void interrupt(unsigned opId) override;

    void interruptAll() override;

    void enableJIT(bool value) override;
    bool isJITEnabled() const override;

    void registerOperation(OperationContext* ctx, MozJSImplScope* scope);
    void unregisterOperation(unsigned int opId);

    using ScopeCallback = void (*)(Scope&);
    ScopeCallback getScopeInitCallback() {
        return _scopeInitCallback;
    };

    DeadlineMonitor<MozJSImplScope>& getDeadlineMonitor() {
        return _deadlineMonitor;
    }

private:
    std::string printKnownOps_inlock();

    /**
     * This mutex protects _opToScopeMap
     */
    stdx::mutex _globalInterruptLock;

    using OpIdToScopeMap = std::unordered_map<unsigned, MozJSImplScope*>;
    OpIdToScopeMap _opToScopeMap;  // map of mongo op ids to scopes (protected by
                                   // _globalInterruptLock).

    DeadlineMonitor<MozJSImplScope> _deadlineMonitor;
};

}  // namespace mozjs
}  // namespace mongo
